What is the national highway ETC charging standard?

[MacSerenity]

ETC charging standards: The transportation department stipulates that all vehicles equipped with ETC can enjoy a toll discount of no less than 5%, with the national unified discount rate being 9.5% off. How ETC works: Through dedicated short-range communication between the on-board electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at the toll station, computer networking technology is used for backend settlement processing with banks. This allows vehicles to pass through highway or bridge toll stations without stopping while still paying the required fees. Where ETC can be installed: For small vehicles such as cars and minivans, the OBU device is installed in the upper middle part of the front windshield. For large vehicles like trucks and buses, the installation position is in the middle to lower part. ETC installation position requirements: The height should be no less than 1.2 meters and no higher than 2.5 meters; the installation angle N should be between 30º and 90º (the angle between the surface of the electronic tag and the horizontal plane).